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House Extensions Romford

Single and double storey extensions in Romford. Trusted, professional, 30+ years' hands-on experience.

GS Renovation designs and builds extensions across Romford, where the interwar semis and modern homes of RM1 sit on the generous plots typical of Havering's suburbs. With over 30 years of local building experience, we take on rear, side-return and wrap-around projects, from foundations through to a fully finished, decorated space.

Steel beams laid out and installed across a rear elevation on a GS Renovation structural job
Two beams on the ground and one already seated. Cavity blockwork and the damp proof course are visible below.

Rear and side extensions on Romford plots

The deep back gardens common to Romford's 1930s semis give real room to extend, which is why single storey rear and wrap-around extensions are so popular in RM1. We dig and pour the foundations, lay the groundworks, and build the shell, then install the steel beams that let us open the new addition into the existing kitchen or reception. Roof works, glazing and the full fit-out follow, all handled by one team.

Double storey extensions suit these houses too, adding a bedroom and a larger kitchen-diner while making the most of the wide plots. Because the properties are semi-detached, we consider the shared boundary from the outset, serve any and set the design to respect your neighbour's light and outlook. Everything structural is signed off by Havering building control as the work proceeds.

Planning and permitted development in Havering

Not every Romford extension needs a planning application. Many single storey rear projects fall under permitted development, provided they stay within the size, height and boundary limits, which the generous RM1 plots often allow. Where a design goes beyond those rights, or where the house sits in a spot with restrictions, we make a full planning application to Havering Council and manage the drawings and submission for you.

Whichever route applies, building regulations always govern the structure, so foundations, beams, insulation and drainage are inspected regardless of the planning position. We advise honestly at the start on which path your property falls under, so there are no surprises. This clarity matters most on the interwar semis, where a wrap-around can quickly cross from permitted development into needing full permission.

  • Wrap-around extensions and infills
  • Roof works and structural alterations at roof level
  • Architectural drawings and structural engineer coordination
  • First fix and second fix plumbing and electrics throughout
  • Scaffolding, site set-up and safe access on tight London plots
Service areaRomford · RM1
Local authorityHavering Council
Part ofEast London (Outer London)
Typical homesInterwar semis and modern homes
Also covered nearbyHornchurch and Havering

Why Choose GS Renovation in Romford

Romford homeowners choose GS Renovation because we manage the whole extension, from foundations and steel to roof and decoration, under one roof. We advise clearly on whether your project is permitted development or needs a planning application to Havering Council, handle party wall matters on semi-detached boundaries, and keep building control informed. Over 30 years in RM1 backs every project.

  • Aftercare and snagging support once the job is finished
  • Foundation depth set after trial holes, drains and trees are checked
  • Photographs kept at each stage for your records
  • Structural engineer instructed and coordinated on your behalf
  • Weathertight shell reached before the fit-out begins
  • Building control inspected at foundation, damp course and steel stages
30+ YearsFounder's experience
Fully Insured5 year guarantee
4.9 / 531 MyBuilder reviews
Building ControlCompliant
Free QuotesNo obligation
Reviews

Rated 4.9 / 5 by our clients

★★★★★ 4.9 average from 31 verified reviews on MyBuilder

★★★★★
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
kath833Wood Green, London · via MyBuilder
★★★★★
Really happy with the quality of remedial works carried out by George in putting other previous tradesman work right. He was very helpful, honest and…
archeryWaltham Cross · via MyBuilder
★★★★★
He was very very good. He just got on with the job and we was beey pleased with the result. He Also cleaned everything away when he finished. Will…
desiree14189Harlow · via MyBuilder
Read all 31 reviews

FAQ

Frequently Asked Questions about House Extensions Romford

How accurate is a house extensions quote for a Romford house?

Very, and deliberately so. Quoting house extensions low to win a Romford job and correcting it later is the commonest complaint homeowners have about builders, and it is not how GS Renovation operates. We survey the RM1 address, itemise, and stand behind the total. Anything genuinely unforeseen is costed and agreed before further work. Ring 07472 424 226 and ask GS Renovation for the RM1 breakdown before you compare it with another Havering quotation for house extensions. As a rough guide, house extensions in London typically starts from roughly £40,000 for a single-storey rear extension and rises with size and specification (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.

What size extension is realistic on a Romford plot?

More than in inner London, because the gardens are generally longer. Houses around Romford often have space for a substantial rear extension without losing the whole garden, and side space as well on the semi detached stock. What limits it is usually daylight to the existing rooms and what permission allows rather than the plot. The design starts from what the house needs, not from the maximum footprint.

Is a two storey extension worth considering in Romford?

Where a bedroom is needed as well as living space, frequently yes. Building up as well as out at your Romford property adds far more floor area for a modest increase in foundation and roof work, though it is more likely to need planning permission and affects the neighbour's outlook more directly. The structural work is greater because loads carry through to the foundations.

What happens where a Romford extension foundation runs near the boundary?

The Party Wall etc. Act is usually engaged and notice is served first. Excavating close to a neighbouring structure at your Romford property brings the work within the Act even where nothing touches the boundary wall. The owner serves notice, and where consent is not given surveyors are appointed and an award follows. The foundation design may be adjusted to suit what the award permits.

How does a Romford extension join the existing roof?

At a junction designed to shed water and stay watertight for the long term. Where a Romford extension meets the existing house, the abutment is flashed into the original brickwork and the falls are set so water runs away from the joint. A shallow or badly detailed junction is the first place a flat roof leaks. That detail is specified rather than left to the roofer on the day.

Every Service, One Team

More GS Renovation Services in Romford

The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Romford. Explore what else we do locally:

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House Extensions Near Romford

We carry out house extensions across Romford and the surrounding areas. Explore a nearby location:

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Free, no-obligation quote for house extensions in Romford. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.

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